Umbrella with a sidewall



FIG. 1 is a perspective view of an umbrella with a sidewall, shown in use with environment;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a side elevation view thereof, with the opposite side being a mirror image thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an enlarged detail view of the sidewall of the umbrella with a sidewall, taken along the dot-dash-dot line in FIG. 3.

The broken lines depict portions of the article and environment that form no part of the claimed design. 

CLAIM The ornamental design for a umbrella with a sidewall, as shown and described. 